thresh·old/`θrɛʃold; ˈθreʃhəʊld/ n 1 on the threshold of sth at the beginning of a new and important event or period 在〔重要事件或时期等〕的开端，起点: We're on the threshold of a new era in telecommunications. 我们正进入电信新纪元。 2 [C] the lowest level at which something starts 〔某事物发生的〕最低水平，起点: the tax threshold 税的起征点 3 [C] the floor of the entrance to a room or building 门槛